เสาเข็มเจาะแห้ง: วิธีการก่อสร้างที่รวดเร็วและประหยัด
??????????????? ????/???????/??? ??????/????/????????? ??????????? ???/???????????/??????? ??/??????/????? ????????????????????? ???/????/?????? ??? ???????/?????????????/???????????????????. ??????? ???/???/????? ???????????????????????? ?????????/????????/?????????????? ??????/???????/????? ??????